Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




For row 3, number 8 is only possible in cell (7,3)









For row 8, number 8 is only possible in cell (3,8)









For row 3, number 9 is only possible in cell (3,3)









For row 4, number 9 is only possible in cell (9,4)









For row 7, number 9 is only possible in cell (7,7)









For row 9, number 9 is only possible in cell (5,9)









For row 2, number 9 is only possible in cell (4,2)









For row 8, number 9 is only possible in cell (2,8)









For row 2, number 8 is only possible in cell (5,2)









For row 6, number 8 is only possible in cell (4,6)









For row 5, number 4 is only possible in cell (6,5)









For row 1, number 1 is only possible in cell (7,1)









For column 5, Number 3 is only possible in cell (5,8)









For box 8, Number 6 is only possible in cell (6,9)









For row 9, number 1 is only possible in cell (1,9)









For box 6, candidates for 2 are all in column 7, so you can remove candidates from other blocks.









For row 9, number 2 is only possible in cell (9,9)









For box 2, candidates for 6 are all in row 1, so you can remove candidates from other blocks.









For column 9, Number 6 is only possible in cell (9,2)









Naked Pair for 5 and 7, can remove these as candidates from other cells.









Either candidate for cell (1,3) forces 6 into cell (1,7).









For box 7, candidates for 3 are all in column 3, so you can remove candidates from other blocks.









Hidden Pair for 3 and 4, can remove other candidates from these cells.









X-Wing in columns for 5.









Either candidate for cell (3,7) forces 5 into cell (9,3).









Number 7 is the only value possible in cell (1,3).









Number 5 is the only value possible in cell (1,8).









Number 3 is the only value possible in cell (3,9).









Number 7 is the only value possible in cell (3,7).









Number 3 is the only value possible in cell (9,7).









Number 4 is the only value possible in cell (9,1).









Number 3 is the only value possible in cell (1,1).









Number 5 is the only value possible in cell (2,2).









Number 2 is the only value possible in cell (3,1).









Number 6 is the only value possible in cell (4,1).









Number 5 is the only value possible in cell (5,1).









Number 4 is the only value possible in cell (1,2).









Number 2 is the only value possible in cell (6,2).









Number 2 is the only value possible in cell (1,6).









Number 6 is the only value possible in cell (5,6).









Number 2 is the only value possible in cell (5,4).









Number 1 is the only value possible in cell (4,5).









Number 5 is the only value possible in cell (6,4).









Number 6 is the only value possible in cell (3,4).









Number 7 is the only value possible in cell (8,4).









Number 3 is the only value possible in cell (8,2).









Number 7 is the only value possible in cell (7,2).









Number 1 is the only value possible in cell (2,4).









Number 3 is the only value possible in cell (2,5).









Number 5 is the only value possible in cell (3,5).









Number 2 is the only value possible in cell (7,5).









Number 6 is the only value possible in cell (8,5).









Number 7 is the only value possible in cell (2,6).









Number 5 is the only value possible in cell (8,6).









Number 3 is the only value possible in cell (7,6).









Number 2 is the only value possible in cell (4,8).









Number 1 is the only value possible in cell (6,8).









Number 4 is the only value possible in cell (8,8).









Number 7 is the only value possible in cell (9,8).









Number 5 is the only value possible in cell (7,9).